torsion product
61Stress (mechanics) — Continuum mechanics …
62Gastropoda — Gastropod Temporal range: Late Cambrian–Recent[1] …
63Levi-Civita connection — In Riemannian geometry, the Levi Civita connection is the torsion free Riemannian connection, i.e., the torsion free connection on the tangent bundle (an affine connection) preserving a given (pseudo )Riemannian metric.The fundamental theorem of… …
64Prüfer domain — In mathematics, a Prüfer domain is a type of commutative ring that generalizes Dedekind domains in a non Noetherian context. These rings possess the nice ideal and module theoretic properties of Dedekind domains, but usually only for finitely… …
65Europe, history of — Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …
66Einstein notation — In mathematics, especially in applications of linear algebra to physics, the Einstein notation or Einstein summation convention is a notational convention useful when dealing with coordinate formulas. It was introduced by Albert Einstein in 1916 …
67Manifold — For other uses, see Manifold (disambiguation). The sphere (surface of a ball) is a two dimensional manifold since it can be represented by a collection of two dimensional maps. In mathematics (specifically in differential geometry and topology),… …
68Second moment of area — The second moment of area, also known as the area moment of inertia or second moment of inertia, is a property of a shape that is used to predict its resistance to bending and deflection which are directly proportional. This is why beams with… …
69Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
70Torque — For other uses, see Torque (disambiguation). Classical mechanics Newton s Second Law …
